If dark matter has been space detected,wouldnt there exist dark time. dont Things to exist need time?

Answer 1

Good question. I think you've fallen into the common misconception that dark matter is the same as space.

This is not the case. Space is what we call the 3D framework in which matter and energy in the Universe resides. In and of itself, it contains nothing and is made of nothing. Surprisingly, Einstein's Theory of General Relativity shows that it can be curved.

Dark matter, on the other hand, is concept that has been coined by astronomers to explain the "missing mass" problem. Basically, we have methods to measure the masses and brightnesses of galaxies. If we calculate the mass of stars needed to produce the observed brightness, we find that it is much less than the observed mass. So galaxies contain invisible matter, which we call "dark matter". We're still not quite sure what this stuff is, but the best guess is that it is a large amount of some sort of fundamental particle (such as an electron) which has no charge or magnetic moment and hence does not interact with light (unlike an electron). Several scientific teams are working on detecting these particles through the Weak interaction.

Answer 2

If it even exists, no it doesn't need dark time.

Anti-matter doesn't need anti-time to exist.